Resolved Question: I think I have a cocaine addiction?

So im 17 and about 6 weeks ago a friend of mine came over and gave me a bag of coke. i tried it and ever since then thats the only thing i have able to think about. i sniff it everyday now and ive started bringing it to school doing it in the bathrooms! i cant take this anymore, ive already spent most of my money on it and i really need help on wat to do. i dont want to tell my mom please help!